Electromagnetic field apparatus



FIG. 1 is a top, front and side perspective view of an electromagnetic field apparatus showing our new design;

FIG. 2 is a top, rear and side perspective view thereof;

FIG. 3 is a left side elevation view thereof; the right side elevation view is a mirror image of the left side elevation view; and,

FIG. 4 is a front elevation view thereof.

The broken lines shown represent unclaimed subject matter and form no part of the claimed design. 

CLAIM We claim the ornamental design for an electromagnetic field apparatus, as shown and described. 